Hello,
I am trying to do communication between Charger IC(BQ25700A) and STM32 controller by using I2C communication protocol.For taking the status of charging/discharging current of battery from charger ic,i have to configure registers in charger ic as shown below:
I am sending data packets as per the SMBus Write-Word protocol and receiving the data as per the SMBus Read-Word protocol. SMBus slave device with address 0b00010010 (0x12H)
I have attached my c code,when i run the code getting zero value.Please give me your suggestions.
Datasheet of BQ25700A: http://www.ti.com/lit/ds/symlink/bq25700a.pdf
#include "main.h"
I2C_HandleTypeDef hi2c1;
UART_HandleTypeDef huart3;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
static void MX_USART3_UART_Init(void);
int main(void)
{
int Buf1[4];
int Buf2[4];
int Buf3[4];
int Buf4[4];
int Buf5[4];
int Buf6[4];
int Buf7[7];
uint8_t TxData;
uint16_t RxData;
int i;
TxData=0x24;
HAL_Init();
/
SystemClock_Config();
MX_GPIO_Init();
MX_I2C1_Init();
MX_USART3_UART_Init();
for(i=0;i<5;i++)
{
//Register:Charge Option0//
Buf1[0]=0x24; //slave address+write
Buf1[1]=0x12; //command byte
Buf1[2]=0x00; //LSB Data
Buf1[3]=0x0A; //MSB Data
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf1,4,100);
//Charge current register//
Buf2[0]=0x24;
Buf2[1]=0x14;
Buf2[2]=0x00;
Buf2[3]=0x02;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf2,4,100);
//Charge voltage register//
Buf3[0]=0x24;
Buf3[1]=0x15;
Buf3[2]=0x60;
Buf3[3]=0x10;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf3,4,100);
//Input voltage register//
Buf4[0]=0x24;
Buf4[1]=0x3D;
Buf4[2]=0x00;
Buf4[3]=0x12;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf4,4,100);
//minimum system voltage//
Buf5[0]=0x24;
Buf5[1]=0x3E;
Buf5[2]=0x00;
Buf5[3]=0x0E;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf5,4,100);
//Input current register//
Buf6[0]=0x24;
Buf6[1]=0x3F;
Buf6[2]=0x00;
Buf6[3]=0x41;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf6,4,100);
//Read: charge/discharge current register //
Buf7[0]=0x24;
Buf7[1]=0x24;
Buf7[2]=0x25;
Buf7[3]=0x00;
Buf7[4]=0x07;
HAL_I2C_Master_Transmit(&hi2c1,0x12,Buf7,5,100);
HAL_I2C_Master_Receive(&hi2c1,0x12,&RxData,1,100);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = 0;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART3|RCC_PERIPHCLK_I2C1;
PeriphClkInit.Usart3ClockSelection = RCC_USART3CLKSOURCE_PCLK1;
PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00000E14;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
}
static void MX_USART3_UART_Init(void)
{
huart3.Instance = USART3;
huart3.Init.BaudRate = 115200;
huart3.Init.WordLength = UART_WORDLENGTH_8B;
huart3.Init.StopBits = UART_STOPBITS_1;
huart3.Init.Parity = UART_PARITY_NONE;
huart3.Init.Mode = UART_MODE_TX_RX;
huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart3.Init.OverSampling = UART_OVERSAMPLING_16;
huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart3) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOB_CLK_ENABLE();
}
void Error_Handler(void)
{
}
#ifdef USE_FULL_ASSERT
void assert_failed(char *file, uint32_t line)
{
}
#endif
